Paul J. Connell/Globe File Photo / 1969

In October 1969, Senator George McGovern prepared to address the crowd at the Vietnam Peace Moratorium on Boston Common.

AFP/Getty Images/file 2007

Former Democratic senator George McGovern of South Dakota testified before the Congressional Progressive Caucus on "The McGovern-Polk Plan for US Military Disengagement From Iraq" in January 2007.

Getty Images

McGovern, a Democrat, unsuccessfully challenged Republican President Richard Nixon in a 1972 presidential campaign.

the boston Globe / file 1972

McGovern visited Boston during his 1972 presidential campaign.

the boston Globe / file 1972

Senators George McGovern and Edward M. Kennedy.

UPI / file 1972

McGovern delivered his acceptance speech after his nomination as the 1972 Democratic candidate for president. His vice presidential running mate, Thomas Eagleton, sat nearby. Eagleton was later replaced by Sargent Shriver after it was discovered that Eagleton had undergone electroshock treatment for depression.

Associated Press/File 1972

McGovern (right) and his new running mate Sargent Shriver raised their hands after the Democratic National Committee endorsed Shriver.

Associated Press/File 1960

McGovern, then a congressman, campaigned with Senator John F. Kennedy in Sioux Falls, S.D., in June 1960.